US1295418A - Paper cup. - Google Patents

Description

GZTJ'. oHLMAN..

wPAPER cur. APPLICATION FILED AUG..23. 1915.

mama Feb. 25,/15919.

3 SHEETS-SHEET?.

G. l. BOHLMAN.

- PAPER cuP. APPLlCATlON FILED AUG.23. l9l5.

' Patented Feb.25,1919.

3 SHEETS-SHEET 3- t Wea,

narran escamas ramen ernten.

GEORGE J'. BOHLMAN, OF MEDFORD, MASSCHUSETTS'ASSIGNOR T0 AMERICAN 'WTEE.

SUPPLY COMPANY F NEW ENGLAND, OF BOSTON, MASSACHUSETTS, A CORPORA- PAPER CUP.

application led August 23, 1915. Serial No. 46,789.

To all whom t may concern: A

Be it known that I, GEORGE J. BOHLMAN,

I a citizen of the United States, residing at Medford, in the county of Middlesex and State of Massachusetts, have invented an Improvement in Paper Cups, of which the following is a specification.

My present invention relates broadly to new and useful improvements in paper receptacles, and has `particular reference to an improved form of paper drinking cup.

' One of the principal objects of the invention is to provide a receptacle of the abovestated character which is constructed with such regard to design and arrangement of parts that it may be cheaply manufactured from a single blank of paper or equivalent material, which, `when complete as an article of manufacture, will be VWater-tight..

It has heretofore been found necessary in the manufacture of paper ldrinking cups to vinc pregnate nished cups with .paran in order that the seams will be water-tight. This step in the manufacture of paper drinking cups adds materially to the cost of production, and is otherwise objectionable since a paraiiin cup cannot be used for hot drinks.

Being cognizant of the above objections to paper cups as they are now manufactured, have, therefore, had in mind as one of the principal objects of my invention the construction of a paper drinking cup from asingle .blank of relatively cheap paper, which blank may be quickly formed into a completed' cup, and will not require that parafin or any equivalent waterproofing material be employed in sealing the seams and otherwise maMng it water-tight.

Another more specic object of my invention is to provide for both the upper and basal edges of the cup annular sti'ening elements which serve to prevent the collapse of the body-wall under ordinary usage and also by pressure from the of the usual containers.

The above and other incidental objects of a similar nature, which will be hereinafter more specifically treated, are accomplished by such means as illustrated in the accomholding element -panying drawings, described in the following specification, and then more particularly pointed out in the claims, which are appended hereto and form a vpart of this application.

hFigure l is a view ofthe blank from which t e ioned;

Fig. 2 is a detail view partly in elevation and partly in longitudinal section of a cup preferred form of receptacle is fash-- constructed from a blank of the type shown'l 60.

in Fig. 1; Fig. 3 is a detail view in side elevation of the cup disclosed in Fig. 2, the bottom portion of the body or side wall of thel cup being broken away to disclose more clearlythe manner in which the bottom wall is connected to the side wall;

Fig.- 4 is a'detail view'partl in elevation and partly in longitudinal sectlon of a modiied form of cup; i

Fig. 5 is a detail view of the modied form of cup shown in Fig. l in a State of partial completion;

Fig. 6 is a side elevation of the modied form of cup shown in Figsfl and 5, looking at the side wall seam thereof, and indicating in dotted lines the manner in which the two sections ofthe blank, which form the side wall, are overlapped and the manner in which the bottom wall is secured to sidewall; 4

Fig. 7 is a detail view of the blank in which the modified form of the cup is constructed; Fig. 8l is a detail view partly in side elevation and partly in longitudinal section of a further modified form of cup;

Fig. 9 is a longitudinal section of the form of cup shown in Fig. 8; Fig 10 is a detail view of the blank from which the modified form of cup of Figs. 8

initial stategand,

Fig. 11 is a detail view of the blank of Fig. 10 showing the blank completed and ready for folding.

the

and 9 are made, showing the blank in its Before taking up a detailed description -v `A any other equivalent material may be employed without departing in any way the spirit-and scope of my present inven-` 'UB my in-y. vention I formthe cup from a blank of.'

- paper, shown in Fig. 1. `The body portion tion. z In the preferred embodiment of vao 10 of this blank is substantially segmental or arcuate in shape, adapting it to be wound around a frusto-conical form, and for the purposes of the present description may be said to consist of two complemental portions 11 and 12, the former of which is slightly shorter than the latter. As will be hereinafter more fully explained the section 11, is, during the manufacture of the cup, to be passed completely around the section 12, it being intended that the cup shall have a two-ply body wall. The upper and lower edges of the two portions ll'and 12, are, therefore, of lengths equal, respectively, to the desired finished external and internal diameters of the upper and base edges of the cup.

The upper edge of the portion 12 has an arcuate extension 15, while the lower or basal edge of the portion 11 has a similar extension 16. The eX-tension-member 15 is adapted to be folded, during the shaping of the blank, by means of a spinner to form an annular lip, which, asvindicated at 15a in Fig. 2, embraces the upper edge of the portion 11, which constitutes the outer ply 11a of the body wall of the cup, as disclosed in Fig. 2. rlhe extension 16 is, however, designed to be folded inwardly and upwardly producing an internal lip or bead, as indicated at 16a in Fig. 2, to assist in holding the bottom wall in position, and also to assist in sealing the seam lbetween-,the perimeter of the bottom Wall and the body-wall.

(in the lower edge of the portion 12, and i-mmediately adjacent to'the junction of this portion with the portion 11 at the separating line 18, is formed a substantially circular tab 19, which memiber, when the blank has been folded or wound on the form, will serve as and constitute the bottom wall of the cup-. Asabove stated the tab 19 is substantially circular, bult, as shown in Fig. 1, smallV triangular fields 20 are left on each side ofthe member 18, to connect this member to the 'body of the blank. These connecting portions 20 yare folded inwardly of the cup along the creasel lines indicated at 21, as will also hereinafter be m-ore'fully` pointed out. At the margin of the member 19 are a plurality of circumferentially` spaced, radially extending slits 22, adapted to form attaching tongues 23. T he slits 22 areof uniform length, and extend inwardly such a distance as to leave an uncut circular field,v which forms the bottom wall proper of the cup.

The specific features of the blank being thus described, reference will now be had to Figs. 2 andv 3, wherein a cu-p formed from the blank of Fig. 1 is disclosed.

As will be seen in these figures the portion 12 of the blank body is first rolled on a form to produce a substantially frusto conical body wall 12".` The triangularelds 2O are restais then creased on the lines 21, and folded upwardly to lie against the outer face of the wall defined by the portion 12, as disclosed best in Fig. 3, thereby'oausing the bottom wall to lie fiaft upon the end of the form. Then the tongues 23 are folded on the circle which comprehends their inner ends, and are extended along the outer face of lthe portion 12, las is also disclosed in Fig. 3. Fol-- lowing these steps the portion 11, to the inner face of which has been applied a film of adhesive material, as in Fig. 1, is passed around the member 12, thereby producing, as in Fig. 2, a, two-ply, substantially frustoconical body or side wall.

Itis now -to be noted that since the tongues 23 are disposed to engage aga-inst the outer face of the inner ply of the body wall, and the port-ion 11 surrounds this member, the tongues are disposed between the two plies and are secured in place by the adhesive material on the inner face of the portion 1l. Thus the 'bottom wall 19 of the cup is firmly secured to the basal edges ofthe side wall of' the cup, and theseam between the bottom wall and 'the .side w-all is practically and etlicicntly sealed, without requiring the employmentl of paraiin or. any equivalent material as a sealing impregnant.

The final steps in the production of a cup of the type shown in Figs. 1,- 2" and 3 is the folding of the extensions 15 and 1G by a spinner or equivalent apparatus. As has been previously stated, the member 15 is folded to embrace the outer ply of the cup body-wall, while the member 16 is folded upwardly and inwardly to engage against the bottom wall l19. Obviously the member 15 constitutes a stifening element for the body wall of the cup, so that when pressure is exerted to the body wall by the fingers of the holders, the wall will not readily collapse, but will maintain its intended and original circular shape at its upper edge. Obviously also the member 16 constitutes a sti'ening element at the basal edge of the cup and further serves as a sealing element for the space between the body wall. In this connection 4it will be appreciated that the member 15 will serve to prevent the escape of any warter which may have passed between the lower edge of the inner ply 12a of the body wall and\the bottom wall, and found its way down inbetween the members 2'3 and the member 11.,

, In concluding the description of the preferred form of my cup, it is now desired to direct particular attention to the following salient features, all of which have been found to contribute materially to the commercial eiiiciency of the receptacle.

Since the body wall of thel cup is formed as a two-ply element, a relatively cheap grade of paper may be employed, for the permeability of a two-ply wall is consider- A further advantage follows from the construction of the body wall as a two-ply element since it ,providesI an eiiicient means for-sealing. the seam between the .body wall and the bottom wall. In this connection reference is made, of course, to the fact that the tongues 23 of fthe 'bottom wall may 'be inserted and 'adhesively held between the two plies of the body wall and the basal edge of the inner ply 12a, thus maintained in sealing engagement with the bottom wall 19.

Having thus described the actual construction of the preferred form of the cup, reference will now be made to Figs. 4, 5,-6 and 7, wherein is illustrated one of the possible modifications to which myvv present invention maybe subjected,

In the modii-ed formv of my invention,

shown in Figs. 4, 5, 6, andy 7, I provide a paper blank which includes as in thepreferred embodiment two complemental 'arcuate or segmental portions 24 and`25, and

Wbers 20 of Fig. 1.

a tab 26 which is substantially circular andequivalent to the tab 19, and is arranged on the ortion 25, andv substantially triangular portions 28, which correspond to the mem- As in the preferred form ofthe invention, the blank is vadapted Y tojbe `wound about a former to produce a outer two-ply wall, the portion 24 constituting an inner ply 24a, as in Fig. 4, and the section 25 constitutin an outer ply 25a. in the preferred irm, the inner face' of the section 24 is provided with .a of adhesive materialby which the two plies are permanently united.- Avplura-lityj of tongues 27 are formed on fthe tabs 26, be! in similar to the members 23 of Fig. 1.

A er the portion24 has been wound abouth the,former the members 27 are folded 'on the creased' lines 28, and disposed to engage the outer face 4of the wall 24, and the tongues 27 are then benlt in the manner previously described in connection with the tongue 23, Ato also engage the' outer face of the member 24a.. The portion 25- is'then passed around the wall 248L forming the Fig. 6.

'raus ,it 'will te Seen that the moaned Witnsses: vg

formV of cup difersfrom' the preferred form of cup only in that he4 extensions l15 and 16'are omitted, and the lips15a and 16a areaccordingly omitted.

As z

ply 25 vof the vcup-'body wall., as 'in y-,zvdsubscribing witnesses.

The modified embodiment of the invention, shown in Figs. 8, 9, 10, and 11, is

formed from a single blank 29, which is of -.segmental shape, but is of a length to form but a single ply body-wall.'for the cup, as indicated at' 29a, as in Figs. 8 and 9.. From the shorter arcuate edge 30, of this blank, extends a substantially circular tab 31, corresponding tothe ftabs 19 and 26, in that it constitutes a bottom wall in the cup when the blank has been shaped in the completed form. On each side of the portion 32, by which the ta'b 31 is connected to the body of. the blank, I cut a substantially triangular notch, as indicated at 33.

These-notches 33 are provided so that the .portion 32 may be creased on the line 34, and on the line 35, for disposing the bottom wall, indicated at 31a, in Fig. 8, above the lower edge of the body-wall 29a.

of the blank-body on each side of the tab 31 upw-ardly and' inwardly to form i the sealing lips, indicated alt 34a, i1-Fig. 8.

The Vformation of the notches 33also makes it possible to bend the lower edge-portions 34v It will be noted that tongues 35, similar to the members 23 and 27, are formed on a tab 31, and are-bent downwardly, as in Figs. 8 and 9, to lie between the lips 34a,

. and the body-wall 29a. When the lip 34'i is formed by theA spinner, the .tongues 35 ressed against the bodying the seam between the body`wall of the cup.

are inclosed and wall 29a, thus sea body-wall andlthe I claim:-

1.' rllhe receptacle herein described formed from flexible, non-metallic material comprising a fbody wall, and a circularly formedbottomv wall integral with fthe 'body wall having a marginal engaging portion and triangular fields at the junctlon of the bottom wall and body wall having intermediate creases.

2. The receptacle hereindescribed formed from flexible, noir-metallic .material comprising-a two-ply body wa-ll and a circularly formed vtab inftegral with one of the plies thereof, arrangedto form a` bottom wall, and means provided at the junction of said tab and ply which admitsof the tab being bent angularly with respect to the ply bearing it on aline which permits the-edge of said ply to projectso as to be turned over upon the other ply In testimony whereof-,I have signed my name'to this specification, in the presence lof

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